Yesterday, the Bloomberg administration released an RFQ for a “BQE Beautification Study.” Now that’s a tall order, if ever there was one, as the borough-bisecting biway is one of Robert Moses’ many “most reviled” memories. But the RFQ also signals a diminishment of sorts for the once ambitious mayor. After all, it was only three years ago that, with the help of Alexander Garvin, the city had envisioned decking over the roadway, not only restoring long-separated and suffering neighborhoods but also creating opportunities for considerable amounts of housing. Then again, maybe it was an obvious decision. After all, those grand plans haven’t gone so well of late.